Mentura Group delivers CDR-Management system to VIRVE-Network. System is used to collect CDR-information from nationwide TETRA-exchanges. Finnish State Security Networks subsidiary Suomen Virveverkko Oy owns and operates the VIRVE network. Introduced in 2002, VIRVE is the world's first nationwide TETRA technology-based radio telephone network. The VIRVE service covers around 35,000 subscriptions, and the network relays [...]